Drop Python 3.9 support (#1316)

Co-authored-by: Sam Bull <[email protected]>

Author: bdraco

.github/workflows/ci-cd.yml

@@ -181,7 +181,6 @@ jobs:
         - 3.12
         - 3.11
         - "3.10"
-        - 3.9
         no-extensions: ['', 'Y']
         os: [ubuntu, macos, windows]
         debug: ['', 'Y']
@@ -199,7 +198,7 @@ jobs:
         - no-extensions: Y
           debug: Y
         include:
-        - pyver: pypy-3.9
+        - pyver: pypy-3.10
           no-extensions: Y
           os: ubuntu
           debug: ''

CHANGES/1316.breaking.rst

@@ -0,0 +1 @@
+Dropped support for Python 3.9 as it has reached end of life.

multidict/_multidict_py.py

@@ -481,7 +481,7 @@ class _HtKeys(Generic[_V]):  # type: ignore[misc]
     log2_size: int
     usable: int
 
-    indices: array  # type: ignore[type-arg] # in py3.9 array is not generic
+    indices: array  # type: ignore[type-arg] # TODO(PY312): array[int]
     entries: list[Optional[_Entry[_V]]]
 
     @functools.cached_property